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:orphan:
=========================================
rbd-nbd -- map rbd images to nbd device
=========================================
.. program:: rbd-nbd
Synopsis
========
| **rbd-nbd** [-c conf] [--read-only] [--device *nbd device*] [--nbds_max *limit*] [--max_part *limit*] [--exclusive] [--timeout *seconds*] map *image-spec* | *snap-spec*
| **rbd-nbd** unmap *nbd device*
| **rbd-nbd** list-mapped
Description
===========
**rbd-nbd** is a client for RADOS block device (rbd) images like rbd kernel module.
It will map a rbd image to a nbd (Network Block Device) device, allowing access it
as regular local block device.
Options
=======
.. option:: -c ceph.conf
Use *ceph.conf* configuration file instead of the default
``/etc/ceph/ceph.conf`` to determine monitor addresses during startup.
.. option:: --read-only
Map read-only.
.. option:: --nbds_max *limit*
Override the parameter of NBD kernel module when modprobe, used to
limit the count of nbd device.
.. option:: --max_part *limit*
Override for module param nbds_max.
.. option:: --exclusive
Forbid writes by other clients.
.. option:: --timeout *seconds*
Override device timeout. Linux kernel will default to a 30 second request timeout.
Allow the user to optionally specify an alternate timeout.
Image and snap specs
====================
| *image-spec* is [*pool-name*]/*image-name*
| *snap-spec* is [*pool-name*]/*image-name*\ @\ *snap-name*
The default for *pool-name* is "rbd". If an image name contains a slash
character ('/'), *pool-name* is required.
Availability
============
**rbd-nbd** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to
the Ceph documentation at http://ceph.com/docs for more information.
See also
========
:doc:`rbd <rbd>`\(8)
|
